Means for attaching saw-teeth.



A No. 682,6!4. Patanted Sept. I7, |901.

E. E. HARRIS.

MEANS FOR ATTACHING SAW TEETH. (Application nl ed'June 24, 1901.) (NoModel.)

UNTTED STATES PATENT OFFICE.

EDVARD E. HARRIS, OF ABERDEEN, WASHINGTON.

M EANS FOR ATTAC HING SAW-TEETH.

SPECIFICATION forming part of Letters Patent No. 682,614, datedSeptember 17, 1.901.

Application filed June 24, 1901. Serial No. 65,868. (No modell| T allwhom, t puny concern:

Be it known that I, EDWARD E. HARRIS, a citizen of the United States,residing at Aberdeen, in the county of Chehalis and State of Washington,have invented a new and useful Means for Attaching Saw-Teeth, of whichthe following is a specification.

This invention relates to means for attaching saw-teeth; and the objectof the same is to have a clamp of such form that it may be turned tolock the tooth in place after the latter has been applied and also toprevent wear directly on the portion of the edge of the clamp adjacentto the tooth by applying a removable device thereto of a considerablyless costly nature than the clamp, and thus reduce the expense ofmaintaining saws in proper practical Working condition and also alwayshave a straight or flat edge adjacent the inner portion of each tooth,With obvious advantages in the cutting operation of the saw.

The invention consists in the construction and arrangement of theseveral parts, which will be more fully hereinafter described andclaimed.

In the drawings, Figure 1 is an elevation of a portion of a saw body orblade, showing the clamp, tooth, and protecting device in operativeassembled relation. Fig. 2 is a section on the line 2 2, Fig. 1. Fig. 3is a detail perspective View of the protector shown applied in Figs. 1and 2. Fig. 4 is a detail elevation of the clamp with aslightlyeditferent form of protector thereon. Fig. 5 is a detailperspective view of the form of protector shown by Fig. 4.

Similar numerals of reference are employed to indicate correspondingparts in the several views.

The numeral 1 designates the body or blade of a saw, having sockets 2formed therein at regular intervals in the arcs of circles, each socketbeing provided at one end with a recess 3, also in the arc of a circleconcentric with but larger than the socket-arc. The wall or edge of eachsocket is V-shaped in cross-section, as at 4, and likewise the Wall 5 ofthe recess 3 is V-shaped in cross-section.

The tooth-clamp 6, which removably lits in the socket 2, has it-s innerconvex edge formed with a V-shaped groove 7 to receive thecorrespondingly-shaped wall of said socket. The clamp is formed withoppositely-disposed key-receiving openings to assist in removing thesame, and from the opening nearest the tooth-recess 3 a slot 8 extendsoutwardly through the clamp edge, and in the forms of clamps shown byFigs. 1 and 4 the outer portion of one Wall of the said slot S is formedwith a recess 9. The clampsshown by Figs. 1 and 4 also have a circularrecess 10 open'- ing out through the outer edge thereof near the centerto provide a seat for a purpose which will be presently set forth. Inthe two clamps just referred to the finger 12, which is formed by theslot 8, has a rounded terminal 11. The clamps shown are adapted toreceive a protector.

Referring now to the arrangement shown by Fig. 1, the tooth 12a isiitted in the recess 3 and has the usual outer cutting-head 13 and isalso formed With a groove 14 in its back edge of the same form as theWall of the said recess to receive the latter wall. The tooth also has alug 15 projecting from the back edge at the inner end to enter a corre*spondingly-shaped recess or seat 16 in the body of the blade, and thefront edge of the tooth also has a recess 17 therein for a purpose whichwill hereinafter appear. The tooth is locked in place by the head 19`ofa protector 18, said protector being carried by the clamp and moved intoplace with the latter. The protector has its head 19 formed with acurved edge 20 to Iit into the recessl' of the tooth, the said latteredge 2O continuing into'a lip 21 to engage the recess 9 and also form aseat to receive the rounded ter'- minal 11 of the tinger 12. A shank 22extends from the'head 19 to fit closely against the outer edge of theclamp from the location of the tooth inwardly, the shank of theprotector shown by Figs. 1 and 3 being straight and that shown by Figs.4 and 5 being curved, both'forms of the protector being duplicates inconstruction, except this simple 'change of form to correspond to theedge' of the clamp engaged thereby. The shank 22 also has a freeunengaged inner end 23 and a circular or other tongue 24 at the inneredge to enter the recess 10.

In the ordinary forms of saw-teeth clamps ICG the edges thereof adjacentto the teeth be= come worn by constant use and assume a rounded contourin cross-section, and thereby the efficiency of the cutting action ofthe saw is materially impaired, particularly after a long period of Wearat the point mentioned. These clamps are also expensive when it isconsidered that they Wear rapidly and have to be replaced to maintain astraight edge adjacent to the teeth to facilitate the cutting action ofthe saw, and the protector heretofore set forth has been providedprincipally to overcome the defects heretofore encountered, andespecially to obviate the necessity of entirely dispensing with the useof a Worn clamp, and thereby materially reduce the cost of keeping thesaw in good Working condition. The protectors will be applied in theiirst instance, and it will be seen that they can be made of materiallyharder metal than the clamps, and when said protectors become Worn so asto be unt for further service they can be quickly withdrawn and otherlike devices substituted therefor. The clamps and protectors can beeasily and quickly removed and applied.

Having thus described the invention, what is claimed as new is- 1. Thecombination with a tooth-holding clamp for a saw of a removableprotector for the throat and tooth engaging portions of Such clamp.

2. The combination with a saw-body having a socket for a clamp, of aclamp mounted in the socket, a protector removably applied to the clamp,and a tooth held in place by said devices.

In testimony that I claim the foregoing as my own I have hereto affixedmy signature in the presence of two Witnesses.

EDWARD E. HARRIS.

Witnesses:

R. P. CAMPBELL, S. W. PEARSON.

